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Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Financial assets: |  |
Cash and due from banks | $ 63,484 | $ 52,175
Interest earning deposits with financial institutions | 78,283 | 47,154
Securities available-for-sale | 1,177,688 | 1,161,701
FHLBC and FRBC Stock | 19,087 | 19,441
Mortgage servicing rights | 9,680 | 10,374
Financial liabilities: |  |
Noninterest bearing deposits | 1,704,083 | 1,704,920
Other short-term borrowings |  | 20,000
Junior subordinated debentures | 25,774 | 25,773
Reported Value Measurement |  |
Financial assets: |  |
Cash and due from banks | 63,484 | 52,175
Interest earning deposits with financial institutions | 78,283 | 47,154
Securities available-for-sale | 1,177,688 | 1,161,701
FHLBC and FRBC Stock | 19,087 | 19,441
Loans held for sale | 3,235 | 1,556
Net loans | 3,955,677 | 3,937,717
Mortgage servicing rights | 9,680 |
Interest rate swap and rate cap agreements | 4,411 | 5,498
Interest rate lock commitments and forward contracts | 1 | 55
Interest receivable on securities and loans | 25,047 | 24,598
Financial liabilities: |  |
Noninterest bearing deposits | 1,704,083 | 1,704,920
Interest bearing deposits | 3,094,356 | 3,063,811
Securities sold under repurchase agreements | 47,252 | 36,657
Other short-term borrowings |  | 20,000
Junior subordinated debentures | 25,774 | 25,773
Subordinated debentures | 59,510 | 59,467
Interest rate swap and rate cap agreements | 1,710 | 3,187
Interest payable on deposits and borrowings | 3,097 | 3,871
Estimate of Fair Value Measurement |  |
Financial assets: |  |
Cash and due from banks | 63,484 | 52,175
Interest earning deposits with financial institutions | 78,283 | 47,154
Securities available-for-sale | 1,177,688 | 1,161,701
FHLBC and FRBC Stock | 19,087 | 19,441
Loans held for sale | 3,235 | 1,556
Net loans | 3,904,578 | 3,818,303
Mortgage servicing rights | 9,680 |
Interest rate swap and rate cap agreements | 4,411 | 5,498
Interest rate lock commitments and forward contracts | 1 | 55
Interest receivable on securities and loans | 25,047 | 24,598
Financial liabilities: |  |
Noninterest bearing deposits | 1,704,083 | 1,704,920
Interest bearing deposits | 3,087,048 | 3,056,180
Securities sold under repurchase agreements | 47,252 | 36,657
Other short-term borrowings |  | 20,000
Junior subordinated debentures | 21,651 | 21,444
Subordinated debentures | 55,690 | 54,533
Interest rate swap and rate cap agreements | 1,710 | 3,187
Interest payable on deposits and borrowings | 3,097 | 3,871
Fair Value, Inputs, Level 1 |  |
Financial assets: |  |
Cash and due from banks | 63,484 | 52,175
Interest earning deposits with financial institutions | 78,283 | 47,154
Securities available-for-sale | 190,446 | 194,143
Financial liabilities: |  |
Noninterest bearing deposits | 1,704,083 | 1,704,920
Fair Value, Inputs, Level 2 |  |
Financial assets: |  |
Securities available-for-sale | 972,701 | 952,408
FHLBC and FRBC Stock | 19,087 | 19,441
Loans held for sale | 3,235 | 1,556
Interest rate swap and rate cap agreements | 4,411 | 5,498
Interest rate lock commitments and forward contracts | 1 | 55
Interest receivable on securities and loans | 25,047 | 24,598
Financial liabilities: |  |
Interest bearing deposits | 3,087,048 | 3,056,180
Securities sold under repurchase agreements | 47,252 | 36,657
Other short-term borrowings |  | 20,000
Junior subordinated debentures | 21,651 | 21,444
Subordinated debentures | 55,690 | 54,533
Interest rate swap and rate cap agreements | 1,710 | 3,187
Interest payable on deposits and borrowings | 3,097 | 3,871
Fair Value, Inputs, Level 3 |  |
Financial assets: |  |
Securities available-for-sale | 14,541 | 15,150
Net loans | 3,904,578 | $ 3,818,303
Mortgage servicing rights | $ 9,680 |

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